Arrangements for a baling press



April 9, 968 G. STOENG 3,376,809

ARRANGEMENTS FOR A BALING PRESS Filed Aug. 1. 1966 r g l INVENTOR. Gum/me firb'e/va 13y ATTORNEYS 3,376,809 ARRANGEMENTS FOR A BALING PRESS Gunnar Stoeng, Oslo, Norway, assignor to Beloit Cor-,

poration, Beloit, Wis., a corporation of Wisconsin Filed Aug. 1, 1966, Ser. No. 569,135

' 2 Claims. (Cl. 100-215) ABSTRACT OF THE DISCLOSURE A baling press incorporating a conveyor passing over a pressing table to deliver material to the pressing table to be pressed. The conveyer is a continuous belt passing over and under the pressing table and wrapping a pair of rolls rotatably secured at stations outwardly of the pressing table. The pressing table includes detachable spacer means secured along one edge thereof to provide a space between the pressing table and the bottom frame of the press. The endless conveyer belt passes through the space on its return run. When the removable spaces are removed from the edge of the pressing table other spacer means positioned along the opposite edge thereof support the pressing table in cantilever fashion when no pressing force is applied to the table.

It is usual practice in factories which produce paper pulp-both cellulose, semichemical and also mechanical wood pulp-to use baling presses in order to increase the density (specific weight) of the paper pulp bales, so as to make them fitted for transport over long distances. In view of the increasing size of the production units in such factories there has in course of time arisen a demand for very large capacity in such paling presses. for example for as much as 150-180 bales per hour, which gives a very short disposable time per unit (bale).

A modern baling press with great capacity must work very quickly, with quick movements up and down of the main piston with the movable pressing board, but it is also important that rapid transport of the bale-or stack of sheetsis obtained in under the pressing piston, and out from this after finished pressing. With the short time at disposal it is important to cut down on all part-times as much as possible. The presses in question here can work with a total pressing force of about 700-1000 tons.

It is known from practice how to arrange some form of transportation through the press, for example by steel band, balata belt, rubber band or by lamellas, and for the conveyer to have driving pulley and a return pulley, and in such manner that the band is endless, so that there is no joint which can get under the bale when it is pressed and make marks in it or tear up the wrapping sheet, or itself be damaged during the very high pressure to which it is subjected.

The bale or the stack is transferred to this conveyer from a feed-conveyer, for example in the form of a rolling table, is carried in on to the pressing board directly underneath the pressing piston, after which the conveyer is stopped by means of an electric limit switch or in some other way, it being possible to provide the drive motor with a magnetic brake in order to ensure instant stoppage. The pressing is effected preferably by the upper pressing board, which is coupled to the piston in a hydraulic cylinder, moving down and causing compression of the material. When it is accomplished and the movable pressing board has reached a certain distance upward, the conveyer is started and carries the compressed bale out on to a conveyer for further transport, and at the same time carries a new bale in under the pressing piston.

3,375,809 Patented Apr. 9, 1968 As the said conveyer or band, which passes through the press itself, is situated between the bale and the lower pressing board, it is exposed to very high and frequent pressure stresses and is exposed therefore to great wear. Thus they must be capable of replacement after a relatively short operation time. As mentioned, the band or belt must be made endless, as joint is not permissible.-

Thus it has great significance to be able to exchange the band or belt easily and quickly and without the necessity for too much dismantling or the lifting of heavy parts.

The arrangement according to the invention aims at obtaining easy, convenient and rapid exchange of the conveyer through the press, without having to dismantle or move heavy parts.

The invention relates to a press of the above-mentioned type, which has a lower pressing board which is journalled along two opposite edges, rear edge and front edge, at a distance above the bottom frame of the press, and is provided with a conveyer consisting of an endless band and two pulleys, over-which the band is passed, namely a driving pulley on one side of the press and a return pulley on the other, which band is carried through the press over and under the pressing board respectively, and serves to carry pressing material into the press to pressing position and thereafter onwards out on the other side.

The invention is designed to make possible a facile replacement of the endless conveyer band, and this is attained by the arrangement that the pressing board is journalled at its front edge on a detachable distancepiece, which can be removed for exchange of the conveyer band by the method that this is drawn out in forward direction and a new endless band is passed in round the pressing board, which during this operation is supported like a cantilever by the permanent journalling at the rear edge of the board.

The invention will below be described in detail in connection with the drawing, which shows diagrammatically an arrangement according to one embodiment of the invention.

In the drawings:

FIGURE 1 shows the device in section along the line I-I in FIGURE 2, Whilst FIGURE 2 is a section along IIII in FIGURE 1.

In the drawing 1 denotes the lower pressing board, which is given great strength, so that it bears pressure and bending moment during pressing under high pressure. 2 is the bottom frame of the press. 3 is a bracket which by means of bolts is fastened to the bottom frame on the rear of the pressing board. This is welded to the bracket in such a position that the lower side of the pressing board is situated a short distance above the top face of the bottom frame. The arrangement of the bracket and the pressing board is, otherwise, such that the pressing board can Without further support be borne like a cantilever by the bracket 3, when pressure is not being exerted on the pressing board. When the press is in action, the front edge of the pressing board rests on a distancepiece 5, which is placed detachably underneath a bracket 6 welded to the pressing board. The distance-piece is held in the position shown in FIGURE 2 by means of bolts 7. 8 is the conveyer and 9 and 10 are driving pulley and turning pulley for the band.

When the endless band 8 needs to be exchanged, the procedure is as follows: The bolts 7 are loosened, the distance-piece 5 is removed by being drawn straight out (it can be provided with eyes or loops for this purpose). The pulleys 9 and 10 are loosened and drawn out, the conveyer band 8 is coiled up and drawn out sideways. New band is inserted, the pulleys and the distance-piece replaced and the bolts fastened.

The bracket 3, the bolts 4 and the pressing board 1 must be dimensioned so strongly and made so rigid that the board is borne without bending when the distancepiece is removed and exchange of the band is performed.

The construction comprises the following advantages:

(1) Shorter time for replacement, small weight of parts which have to be removed, no need for special tools or lifting gear, less and more convenient work than with other constructions.

(2) The whole construction is very compact, so that columns of the press can be placed closer together than in other presses. This reduces the bending moments and stresses, for which reason the press can be given smaller dimensions, including the dimensions of the top-piece, the bottom frame, the columns etc., and will have less weight and be cheaper to make.

I claim as my invention:

1. A baling press including:

a bottom frame;

a press table positioned over said bottom frame for receiving articles to be pressed thereon;

first and second spacer means each positioned along opposite edges of said press table to provide a space between said bottom frame and said press table;

an endless conveyer belt passing over said press table during the active run thereof and passing through said space between said bottom frame and said press table during the return run; the improvement therein comprising, means for detachably securing at least one of said first and second spacer means along one edge of said press table to enable said endless belt to be removed and replaced. 2. A baling press according to claim 1 wherein the other of said spaced means supports said press table in cantilever fashion when no pressing force is applied to said pressing table.

References Cited UNITED STATES PATENTS 1,949,917 3/1934 Muench 100-218 XR 2,084,980 6/ 1937 Sweeney. 2,159,779 5/1939 Cavin 100222 FOREIGN PATENTS 1,012,634 12/ 1965 Great Britain.

137,731 10/1952 Sweden.

BILLY J. WILHITE, Primary Examiner. 

